Object representation of the parameter element.
Object fields are:
Scalar: value,
Scalar: name,
The constructor accepts only single parameter, it could be a hashref to parameters hash or DOM with 'parameter' element

merge with another parameter ( append + overwrite if exists )
we can do it differently
method #1:
convert to dom both objects and then get resulted object from combined dom
method #2 default:
through the introspection of the object